Increase range of BA1404 transmitter by using RF receiver amp

Discussion in 'Wireless & RF Design' started by senakahks, Oct 24, 2015.

  1. senakahks

    Thread Starter New Member

    Apr 6, 2009
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  2. DickCappels

    Moderator

    Aug 21, 2008
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    Maybe if you can adjust the output circuit (L2 and its three capacitors) to get a 50 ohm output. Note that increasing the output might cause problems with broadcasters, neighbors, and the government.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    The given link has an amplifier for the receiver end.
    It has not the power for a transmitter application.

    Bertus
     
  4. senakahks

    Thread Starter New Member

    Apr 6, 2009
    3
    0
    I purchased that RF amplifier after looking at following schematic.

    [​IMG]

    Can somebody guess the 4 pin IC here? following link recommends above circuit for BA1404 transmitters.

    http://electronics-diy.com/BA1404_Stereo_FM_Transmitter.php

    Also will this kind of additions change the output frequency or generate harmonics? If so dangerous to use.
     
  5. bertus

    Administrator

    Apr 5, 2008
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  6. BR-549

    Well-Known Member

    Sep 22, 2013
    1,982
    388
    Usually, raising the antenna and shortening the feed line works much better.
     
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